* Three sentences use tobe
1, She is a doctor
2, I am a student
3, He is singing a song
* From 0 to 20
+)zero , one , two , three , four , five, six , seven , eight , nine , ten , eleven , twelve , thirteen , fourteen , fifteen , sixteen , seventeen ,eighteen , nineteen , twenty .
+) first , second , third , fourth , fifth , sixth , seventh , eighth , ninth , tenth , eleventh , twelfth , thirteenth , fourteenth, fifteenth , sixteenth , seventeenth , eighteenth , nineteenth , twentieth .